Walsh was one of the stars of Strictly Come Dancing two years ago, making it to the finals of the BBC1 show.

"My friends have joked that my baby would arrive on time because I'm so punctual, and he did! I gave birth on Thursday 4th September, which was my due date," she said.

She announced her pregnancy online in February and her former bandmates admitted they had been struggling to keep quiet about the secret, with Cheryl Fernandez-Versini - formerly Cole - admitting: "I thought at one point I was going to burst."